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加温温度对Cr-Ni-Mo-V转子钢的微观结构和机械性能的影响

Chao Zhao¹, Xinyi Zhang¹, Xiaojie Liang²

¹School of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, China.

Materials (Basel, Switzerland)

|February 13, 2025

概括

在650°C温度下加热Cr-Ni-Mo-V转子钢优化了机械性能. 这种温度促进了带有球形碳化物的有益微观结构,增强了先进材料应用的抗拉强度和延长性.

科学领域:

金工程金工程金工程
材料科学材料科学材料科学

背景情况:

像Cr-Ni-Mo-V这样的转子钢在苛刻的应用中是关键组件.
了解钢化对微观结构-属性关系的影响对于性能优化至关重要.

研究的目的:

研究炼温度 (450-700°C) 对Cr-Ni-Mo-V转子钢的微观结构和机械性能的影响.
确定最佳的炼条件,以实现强度和可塑性的优越组合.

主要方法:

水火,然后在不同温度 (450-700°C) 进行炼.
微结构分析观察矩阵和沉演变.
机械性能测试,包括拉伸强度和延长测量.
断裂表面分析以描述故障机制.

主要成果:

炼温度显著改变了微观结构和机械性能.
最佳抗拉强度 (1028.608 MPa) 和延长 (19%) 在650°C达到,这是由于马氏体,固体溶液和球形Mo₂C/VC粒子强化.
较低的炼温度 (例如550°C) 导致由于棒形Fe₃Mo₃C沉而导致强度降低.
较高的温度 (700°C) 导致碳化物粗化和马氏体再结晶的强度损失.
断裂模式从裂纹转换为穴,随着加热温度的增加.

结论:

炼温度是定制Cr-Ni-Mo-V转子钢的机械性能的一个关键因素.
炼温度为650°C,使得高抗拉强度和柔性之间取得了出色的平衡.
微结构进化,特别是沉形态和矩阵结构,决定了观察到的机械性质和断裂行为.

关键词:

在Cr-Ni-Mo-V转子钢中.这是一种碳化物碳化物.机械性质机械性质机械性质制温度是指制温度的温度.

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